<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>4890</id>
    <completedYear>2025</completedYear>
    <publishedYear>2025</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>15</pageNumber>
    <edition/>
    <issue/>
    <volume>2025</volume>
    <type>conferenceobject</type>
    <publisherName>IEEE</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2025-07-11</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Privacy from 5 PM to 6 AM: Tracking and Transparency Mechanisms in the HbbTV Ecosystem</title>
    <abstract language="eng">Hybrid broadcast broadband television (HbbTV) is an evolving technology that connects linear TV with modern HTML5 applications, delivering extras like games, videos, and online shopping. However, its bidirectional transmission functionality raises privacy concerns, as it introduces new tracking methods for TV channels. While previous studies focused on security issues or user awareness of HbbTV privacy challenges, a detailed examination of the tracking and transparency mechanisms of the HbbTV ecosystem is still missing. This study fills this gap by extensively analyzing these features within the European HbbTV ecosystem, and in particular within German-language TV channels. We monitored more than 350 TV channels for over 400 hours, evaluating 1) prevalent HbbTV tracking methods, 2) consent notice prevalence and user interactions, and 3) privacy policy disclosures. Our findings indicate that the HbbTV tracking system operates independently of the Web, consent notices exploit system constraints to influence users, and privacy policies often do not align with actual data practices.</abstract>
    <parentTitle language="eng">2025 55th Annual IEEE/IFIP International Conference on Dependable Systems and Networks (DSN). 23-26 June 2025, Naples, Italy. Conference Proceedings</parentTitle>
    <identifier type="doi">10.1109/DSN64029.2025.00017</identifier>
    <identifier type="issn">2158-3927</identifier>
    <identifier type="isbn">979-8-3315-1201-9</identifier>
    <enrichment key="opus.source">publish</enrichment>
    <licence>© Alle Rechte vorbehalten</licence>
    <author>Christian Böttger</author>
    <author>Henry Hosseini</author>
    <author>Christine Utz</author>
    <author>Nurullah Demir</author>
    <author>Jan Hörnemann</author>
    <author>Christian Wressnegger</author>
    <author>Thomas Hupperich</author>
    <author>Norbert Pohlmann</author>
    <author>Matteo Große-Kampmann</author>
    <author>Tobias Urban</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>HbbTV</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>smart TV</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>privacy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>privacy policies</value>
    </subject>
    <collection role="institutes" number="FB 3">Informatik und Kommunikation</collection>
    <collection role="institutes" number="">Institut für Internetsicherheit</collection>
    <thesisPublisher>Westfälische Hochschule Gelsenkirchen Bocholt Recklinghausen</thesisPublisher>
  </doc>
</export-example>
